Stress & Premenstrual Symptoms Study

Eligibility Details: Inclusion Criteria: Participants must be: 1. Aged 18 - 50 years, per self-report 2. Able to give written informed consent, per self-report 3. Fluent in written and spoken English 4. Have normal or corrected to normal hearing and vision, per self-report 5. Female participants must be experiencing regular menstrual cycles (24-39 days), per self-report 6. Have a negative urine drug screen. Exclusion Criteria: Participants cannot have: 1. Use of an psychotropic medication anytime in the past 2 months, per self-report 2. Drug or alcohol abuse history within previous 2 years 3. Lifetime history of psychotic disorder including, schizophrenia, schizoaffective disorder, major depression with psychotic features and bipolar disorder, per self-report 4. Currently homeless, per self-report 5. History of any Axis I disorder other then specific phobia within the past 12 months, per SCID interview 6. Active suicidal ideation (suicide plan or suicide attempt) within the previous 6 months, per self-report 7. Steroid hormone or hormonal contraceptive use in the past 6 months, per self-report, except emergency contraceptive use 8. Pregnancy in the past year, per self-report. Pregnancy during the study is also exclusionary. Participants must use a reliable, nonhormonal form of birth control during the study. If a participant becomes pregnant, she must inform study staff. 9. Sensitive hearing, per self-report.